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Q28
(CISF/2020)
Science & Technology › Basic Science (Physics, Chemistry, Biology)
How many moles of water would be produced by the complete combustion of one mole of natural gas, CH4, in excess of oxygen ?
Result
Your answer:
—
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Correct:
B
Explanation
The complete combustion of methane (CH4), which is the primary component of natural gas, is represented by the following balanced chemical equation:
CH4 + 2O2 → CO2 + 2H2O
According to the stoichiometry of this reaction, 1 mole of methane reacts with 2 moles of oxygen (O2) to yield 1 mole of carbon dioxide (CO2) and 2 moles of water (H2O). Therefore, the complete combustion of one mole of natural gas produces exactly 2 moles of water.
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